Why do cats like sitting in boxes?
Boxes provide two things for kitties: security, and a good vantage point. Basically, cats want to rest (all day basically), but they also want to feel protected while they are still able to survey their surroundings. The other side of this coin is that cats just love to explore! When a box (or anything new) is introduced to their environment, their first instinct is usually to go, sniff, and sit.